Chalk stamper



FIG. 1 is a perspective view of a chalk stamper showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken line showing of bindings is included for the purpose of illustrating environment and forms no part of the claimed design. 

The ornamental design for a chalk stamper, as shown and described. 